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nexus: Add timing structures to BBA

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2020-11-09 11:43:54 +00:00
parent 629a06b0ae
commit 4e5ad7feac
2 changed files with 50 additions and 2 deletions
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50
nexus/arch.h
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@ -108,7 +108,7 @@ enum PipFlags
NPNR_PACKED_STRUCT(struct PipInfoPOD {
uint16_t from_wire, to_wire;
uint16_t flags;
uint16_t padding;
uint16_t timing_class;
int32_t tile_type;
});
@ -273,13 +273,61 @@ NPNR_PACKED_STRUCT(struct IdStringDBPOD {
RelPtr<RelPtr<char>> bba_id_strs;
});
// Timing structures are generally sorted using IdString indices as keys for fast binary searches
// All delays are integer picoseconds
// Sort key: (from_port, to_port) for binary search by IdString
NPNR_PACKED_STRUCT(struct CellPropDelayPOD {
int32_t from_port;
int32_t to_port;
int32_t min_delay;
int32_t max_delay;
});
// Sort key: (sig_port, clock_port) for binary search by IdString
NPNR_PACKED_STRUCT(struct CellSetupHoldPOD {
int32_t sig_port;
int32_t clock_port;
int32_t min_setup;
int32_t max_setup;
int32_t min_hold;
int32_t max_hold;
});
// Sort key: (cell_type, cell_variant) for binary search by IdString
NPNR_PACKED_STRUCT(struct CellTimingPOD {
int32_t cell_type;
int32_t cell_variant;
int32_t num_prop_delays;
int32_t num_setup_holds;
RelPtr<CellPropDelayPOD> prop_delays;
RelPtr<CellSetupHoldPOD> setup_holds;
});
NPNR_PACKED_STRUCT(struct PipTimingPOD {
int32_t min_delay;
int32_t max_delay;
int32_t min_fanout_adder;
int32_t max_fanout_adder;
});
NPNR_PACKED_STRUCT(struct SpeedGradePOD {
RelPtr<char> name;
int32_t num_cell_types;
int32_t num_pip_classes;
RelPtr<CellTimingPOD> cell_types;
RelPtr<PipTimingPOD> pip_classes;
});
NPNR_PACKED_STRUCT(struct DatabasePOD {
uint32_t version;
uint32_t num_chips;
uint32_t num_loctypes;
uint32_t num_speed_grades;
RelPtr<char> family;
RelPtr<ChipInfoPOD> chips;
RelPtr<LocTypePOD> loctypes;
RelPtr<SpeedGradePOD> speed_grades;
RelPtr<IdStringDBPOD> ids;
});

2
nexus/bba_version.inc
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@ -1 +1 @@
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